Rotary pump.



S. D. WRIGHT.

ROTARY PUMP.

APPLICATION FILED JUNE 4, 1910.

Patented July 9, 19M.

M cow/J @L W /W w L W rotary pumps and the principal object'in specification and clearly illustratedin the A SO ' ing the construction of the rotary piston andv Y' ing through their dead path, Fig. 4 is a 'an outlet or discharge opening 3. The

SYLVANUS D. WRIGHT, .0F WASHINGTON, DISTRICT 0F COLUMB'I.

.ROTARY PUME' i names.

To all whom t may concern.' v

Be it known that l, SrLvANUs D. WRIGHT, citizen of the United States, residing at Washington, in the District oi' Columbia, have invented certain new and useful improvements in Rotary. Pumps, of which, the following is a specification. A

.This invention relates to improvements in i view is the construction of a simple and efficient rotary pump particularly adapted to be operated at low speed and provided with gravity controlled piston plungers for l pumping water. i

Another object of the invention is theconstruction of an improved rotary pump having a plurality of plunger members mounted in a rotary piston operating in a cylinder, which is provided with means for forcing the plungers into an inoperative position, the plungers being formed hollow so that they will not be resisted by the tlow or pressure of the water-in the p'ump.

With the above and other objects in view the invention consists in certain combinations, constructions Vand arrangements yof parts, clearly described in the .following accompanying drawings, in which,

Figure 1 1s a vertical sectional View showthe plungerl members thereof, Fig. 2 is a sectional view taken on line' 2-2 looking in the direction of the arrows, and Fig. 3 is a detail sectional View of the 'means for operating the plungers while they are passdetail longitudinal sectional view of a plunger member.

. Referring to the accompanying drawings illustrating the invention 1 denotes the cylindex` which is ormedwith an inlet '2 and upper part of the cylinder is formed with an offset portion 4, which forms a relief for (the pressure on the plungers in thecylin- 0n the side walls' of the cylinder l ka shaft 6 is suitably journaled. On the shaft, between the sidewalls 5, a piston 7 is keyed. This piston lis formed with three pockets or slots 8, disposed at e 11i-distant points in the piston, and in whic slots or pockets the plunger members .or movable wings 9 operate. T e plunger members or movable wings are formed hollow so that iuid may Specicaton of Letters Patent.

Patented July 9, item2.

Application filed June 4, 1910.' Serial No. 565,115.

1 readily pass therethrough in orderthat they can freely enter the slots or pockets in the piston and freely drop out ot' the pockets,

as the piston is rotated with the s aft.4

-Were these plungers solid any tiuid inthe slots would prevent the entry of the plunger and likewise suction would prevent it dropping therefrom. rl`he piston is rotated in the direction of the arrowshown in F ig. 1. When the piston is in the position shown in this ligure one of 'the wings or plunger members will be in an inoperative position on the topof the piston, one will bein a' pumping or operative position on the lower part of the piston and one will be held in an inoperative position by the curved guide 10, which is located in the cylinder l. rA stop or interrupter l1 extends across` the cylinder to-prevent the water from owing back or exerting a back pressure against the .pumping blade or plunger member. This stop is set in slots formed in the guide 10, which is made in two parts, and may be made in one piece, as shown in F ig. 3,

yand which guide is formed with diagonally cut grooves so that the water may flow 'freely through the same, and the plungerl members will not be cut with grooves. The outer su; .ce of the guide l0 tits against the inner surface of the cylinder, while the inner surface of the guide is formed with acurve of considerably greater radius than that of the piston so' that the upper and lower edges of said guide will be spaced apart from the piston; and willfgradually `close the-plunger members in their pockets orallow them to drop out of their pockets.

.The plunger members or movable wings are,

not only formed hollow but their ends are open. A

Having described my invention l claim 1. In a rotary pump the combination with a casing provided with inlet and outlet ports andan abutment between said ports of an impelle'r which consists of a rotary carrier 'with recesses and plungers mounted and nioving'in saidrecesses, so arranged that their free ends :nove to greater or less distances from the axis of rotation, said pluners having unpbstructed-passages extend mg entirely through them from end toy end of suiioient caliber to permitfthem to move in and 'out of said recesses under the inuenoeof gravity only, so'as to engage the walls of Vthe casing and pass the abutment as the carrier is rotated.

"inner vlWall and with inlet and outlet ports,

of an` abutment between said ports, an im- 'pelle'r consisting of a rotary carrier having reeessestherein and plungers movable. in, said recesses,'each of said plungers'having an unobstructed passage extending from one of its ends to the other end of suicient caliber 'to permit it to move in and out of its recess by gravity only, so as t6 engage the walls of the casing and pass the abutment as the carrierds'rotate'd, said cavity adapted to relieve the pressure upon said plunger when they reach it. A y

'3. In a rotary pump, the combination with a casing formed WithI a. cavity in `its inner Wall and with inletl and outlet ports, of an abutment between said ports, an impeller vconsisting of 'a'rotary carrier having recesses therein and plungers movablein and out of said recesses by gravity only/s0 yas to engage the ivalls of the casing and pass the abutment as the carrier is rotated, said cavity adapted toy relieve the pressure upon said 'plungers `When they* reach it.

In testimony whereof IhaiX my signature in presence of two Witnesses.

' ,SYLVANUS D.' WRGHT.

Witnesses: I f

L. M. GILLESPIE,

GEO. WEDDERBURN. 

